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https://issues.apache.org/jira/browse/STORM-1273?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15159438#comment-15159438
]
ASF GitHub Bot commented on STORM-1273:
---------------------------------------
Github user revans2 commented on a diff in the pull request:
https://github.com/apache/storm/pull/1081#discussion_r53830934
--- Diff: storm-core/src/jvm/org/apache/storm/cluster/ZKStateStorage.java
---
@@ -0,0 +1,270 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.storm.cluster;
+
+import org.apache.curator.framework.CuratorFramework;
+import org.apache.curator.framework.state.*;
+import org.apache.curator.framework.state.ConnectionState;
+import org.apache.storm.Config;
+import org.apache.storm.callback.DefaultWatcherCallBack;
+import org.apache.storm.callback.WatcherCallBack;
+import org.apache.storm.callback.ZKStateChangedCallback;
+import org.apache.storm.utils.Utils;
+import org.apache.storm.zookeeper.Zookeeper;
+import org.apache.zookeeper.CreateMode;
+import org.apache.zookeeper.KeeperException;
+import org.apache.zookeeper.Watcher;
+import org.apache.zookeeper.data.ACL;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+public class ZKStateStorage implements IStateStorage {
+
+ private static Logger LOG =
LoggerFactory.getLogger(ZKStateStorage.class);
+
+ private ConcurrentHashMap<String, ZKStateChangedCallback> callbacks =
new ConcurrentHashMap<String, ZKStateChangedCallback>();
+ private CuratorFramework zkWriter;
+ private CuratorFramework zkReader;
+ private AtomicBoolean active;
+
+ private boolean isNimbus;
+ private Map authConf;
+ private Map<Object, Object> conf;
+
+ public ZKStateStorage(Map<Object, Object> conf, Map authConf,
List<ACL> acls, ClusterStateContext context) throws Exception {
+ this.conf = conf;
+ this.authConf = authConf;
+ if (context.getDaemonType().equals(DaemonType.NIMBUS))
+ this.isNimbus = true;
+
+ // just mkdir STORM_ZOOKEEPER_ROOT dir
+ CuratorFramework zkTemp = mkZk();
+ String rootPath =
String.valueOf(conf.get(Config.STORM_ZOOKEEPER_ROOT));
+ Zookeeper.mkdirs(zkTemp, rootPath, acls);
+ zkTemp.close();
+
+ active = new AtomicBoolean(true);
+ zkWriter = mkZk(new WatcherCallBack() {
+ @Override
+ public void execute(Watcher.Event.KeeperState state,
Watcher.Event.EventType type, String path) {
+ if (active.get()) {
+ if
(!(state.equals(Watcher.Event.KeeperState.SyncConnected))) {
+ LOG.warn("Received event {} : {}: {} with
disconnected Zookeeper.", state, type, path);
+ } else {
+ LOG.info("Received event {} : {} : {}", state,
type, path);
+ }
+
+ if (!type.equals(Watcher.Event.EventType.None)) {
+ for (Map.Entry<String, ZKStateChangedCallback> e :
callbacks.entrySet()) {
+ ZKStateChangedCallback fn = e.getValue();
+ fn.changed(type, path);
+ }
+ }
+ }
+ }
+ });
+ if (isNimbus) {
+ zkReader = mkZk(new WatcherCallBack() {
--- End diff --
It might be nice to reuse the same watcher callback instance, just so we
don't have two identical anonymous classes.
> port backtype.storm.cluster to java
> -----------------------------------
>
> Key: STORM-1273
> URL: https://issues.apache.org/jira/browse/STORM-1273
> Project: Apache Storm
> Issue Type: New Feature
> Components: storm-core
> Reporter: Robert Joseph Evans
> Assignee: John Fang
> Labels: java-migration, jstorm-merger
>
> current state of the cluster (Some of this moves to java as a part of
> heartbeat server)
> https://github.com/apache/storm/tree/jstorm-import/jstorm-core/src/main/java/com/alibaba/jstorm/cluster
> as an example
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